/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraFunctionLibrary.h
Returns a free collision group for use in HWRT collision group filtering. Returns -1 on failure.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=Niagara, Meta=(Keywords="niagara collision ray tracing", WorldContext="WorldContextObject")) static int32 AcquireNiagaraGPURayTracedCollisionGroup ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject )